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https://issues.apache.org/jira/browse/SPARK-22939?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Apache Spark reassigned SPARK-22939:
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Assignee: Apache Spark
> Support Spark UDF in registerFunction
> -------------------------------------
>
> Key: SPARK-22939
> URL: https://issues.apache.org/jira/browse/SPARK-22939
> Project: Spark
> Issue Type: Bug
> Components: PySpark, SQL
> Affects Versions: 2.3.0
> Reporter: Xiao Li
> Assignee: Apache Spark
>
> {noformat}
> import random
> from pyspark.sql.functions import udf
> from pyspark.sql.types import IntegerType, StringType
> random_udf = udf(lambda: int(random.random() * 100),
> IntegerType()).asNondeterministic()
> spark.catalog.registerFunction("random_udf", random_udf, StringType())
> spark.sql("SELECT random_udf()").collect()
> {noformat}
> We will get the following error.
> {noformat}
> Py4JError: An error occurred while calling o29.__getnewargs__. Trace:
> py4j.Py4JException: Method __getnewargs__([]) does not exist
> at py4j.reflection.ReflectionEngine.getMethod(ReflectionEngine.java:318)
> at py4j.reflection.ReflectionEngine.getMethod(ReflectionEngine.java:326)
> at py4j.Gateway.invoke(Gateway.java:274)
> at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132)
> at py4j.commands.CallCommand.execute(CallCommand.java:79)
> at py4j.GatewayConnection.run(GatewayConnection.java:214)
> at java.lang.Thread.run(Thread.java:745)
> {noformat}
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